#include "usart.h"
#include "stm32f4xx_gpio.h"
#include "stm32f4xx_rcc.h"


void RCC_Configuration(void)
{ 
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 |RCC_APB1Periph_TIM3 | RCC_APB1Periph_TIM4
						|RCC_APB1Periph_USART2|RCC_APB1Periph_USART3, ENABLE);
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB
  						| RCC_APB2Periph_GPIOC| RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE
						| RCC_APB2Periph_USART1, ENABLE);
}
void USART1_Configuration(void)
{
	USART_InitTypeDef USART_InitStructure;
	GPIO_InitTypeDef GPIO_InitStructure;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;   
	GPIO_Init(GPIOA, &GPIO_InitStructure);
	
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;			  
	GPIO_Init(GPIOA, &GPIO_InitStructure);
	
	USART_InitStructure.USART_BaudRate = 115200;
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;
	USART_InitStructure.USART_StopBits = USART_StopBits_1;
	USART_InitStructure.USART_Parity = USART_Parity_No;
	USART_InitStructure.USART_HardwareFlowControl =    USART_HardwareFlowControl_None;
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
	USART_Init(USART1, &USART_InitStructure);
	
	USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
	USART_ITConfig(USART1, USART_IT_IDLE, ENABLE);
	USART_Cmd(USART1, ENABLE);
}
void NVIC_Configuration(void)
{
	NVIC_InitTypeDef NVIC_InitStructure;
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
	
	NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStructure);
	

}
